<!DOCTYPE html>
<html lang="zh-CN">
    <head>
        <title>LBCbootstrap</title>
        <meta charset="utf-8"> 
        <link rel="stylesheet"  href="a.css" />       
    </head>
    <body>
         <header>
             <div class="head-cen">
                 <div class="head-cen-left">

                 </div>
                 <div class="head-cen-right">

                 </div>
             </div>
         </header>


        <h1>fsadsfsaf</h1>


    </body>
</html>